Fault Detection and Zonal Protection Strategy of Multi-Voltage Level DC Grid Based on Fault Traveling Wave Characteristic Extraction
Currently, DC breakers are commonly used in mainstream protection schemes for DC grids to eliminate faults. However, the cost of high voltage DC (HVDC) breakers is high, and equipping each DC line with DC breakers is expensive. In order to minimize the number of DC breakers while ensuring the reliab...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-04-01
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| Series: | Electronics |
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| Online Access: | https://www.mdpi.com/2079-9292/12/8/1764 |
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| author | Yuqi Han Ruiguang Ma Ting Li Wenhui Zeng Yangtao Liu Yuhong Wang Chunsheng Guo Jianquan Liao |
| author_facet | Yuqi Han Ruiguang Ma Ting Li Wenhui Zeng Yangtao Liu Yuhong Wang Chunsheng Guo Jianquan Liao |
| author_sort | Yuqi Han |
| collection | DOAJ |
| description | Currently, DC breakers are commonly used in mainstream protection schemes for DC grids to eliminate faults. However, the cost of high voltage DC (HVDC) breakers is high, and equipping each DC line with DC breakers is expensive. In order to minimize the number of DC breakers while ensuring the reliability of the power supply, a zonal protection strategy suitable for multi-voltage level DC grids is proposed. Subsequently, the qualitative impact of partial power interruption caused by fault DC areas is analyzed in the system. The basic zonal principle of the multi-voltage level DC grid is formulated, taking into account unbalanced power, the mode of system-level control, and the type of converters. Additionally, a time sequence coordination strategy is derived in detail based on the characteristics of DC breakers, AC/DC converters, DC/DC converters, AC breakers, high-speed switches, and other fault removal components. Finally, a seven-terminal DC grid is modeled in the PSCAD/EMTDC simulation platform. According to the simulation analysis, the DC grid can adopt the converter with fault clearing ability or an AC circuit breaker to cooperate with the fast disconnector (FD) to complete fault clearing in the DC fault area under the proposed zonal protection coordination strategy. |
| first_indexed | 2024-03-11T05:05:12Z |
| format | Article |
| id | doaj.art-9220131ff96f4e5aba7d4e918cef16e4 |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-03-11T05:05:12Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-9220131ff96f4e5aba7d4e918cef16e42023-11-17T19:00:34ZengMDPI AGElectronics2079-92922023-04-01128176410.3390/electronics12081764Fault Detection and Zonal Protection Strategy of Multi-Voltage Level DC Grid Based on Fault Traveling Wave Characteristic ExtractionYuqi Han0Ruiguang Ma1Ting Li2Wenhui Zeng3Yangtao Liu4Yuhong Wang5Chunsheng Guo6Jianquan Liao7State Grid Sichuan Economic Research Institute, Chengdu 610095, ChinaState Grid Sichuan Economic Research Institute, Chengdu 610095, ChinaState Grid Sichuan Economic Research Institute, Chengdu 610095, ChinaState Grid Sichuan Economic Research Institute, Chengdu 610095, ChinaCollege of Electrical Engineering, Sichuan University, Chengdu 610065, ChinaCollege of Electrical Engineering, Sichuan University, Chengdu 610065, ChinaCollege of Electrical Engineering, Sichuan University, Chengdu 610065, ChinaCollege of Electrical Engineering, Sichuan University, Chengdu 610065, ChinaCurrently, DC breakers are commonly used in mainstream protection schemes for DC grids to eliminate faults. However, the cost of high voltage DC (HVDC) breakers is high, and equipping each DC line with DC breakers is expensive. In order to minimize the number of DC breakers while ensuring the reliability of the power supply, a zonal protection strategy suitable for multi-voltage level DC grids is proposed. Subsequently, the qualitative impact of partial power interruption caused by fault DC areas is analyzed in the system. The basic zonal principle of the multi-voltage level DC grid is formulated, taking into account unbalanced power, the mode of system-level control, and the type of converters. Additionally, a time sequence coordination strategy is derived in detail based on the characteristics of DC breakers, AC/DC converters, DC/DC converters, AC breakers, high-speed switches, and other fault removal components. Finally, a seven-terminal DC grid is modeled in the PSCAD/EMTDC simulation platform. According to the simulation analysis, the DC grid can adopt the converter with fault clearing ability or an AC circuit breaker to cooperate with the fast disconnector (FD) to complete fault clearing in the DC fault area under the proposed zonal protection coordination strategy.https://www.mdpi.com/2079-9292/12/8/1764DC gridDC breakerfault-blocking converterzonal protectionprotection coordination |
| spellingShingle | Yuqi Han Ruiguang Ma Ting Li Wenhui Zeng Yangtao Liu Yuhong Wang Chunsheng Guo Jianquan Liao Fault Detection and Zonal Protection Strategy of Multi-Voltage Level DC Grid Based on Fault Traveling Wave Characteristic Extraction Electronics DC grid DC breaker fault-blocking converter zonal protection protection coordination |
| title | Fault Detection and Zonal Protection Strategy of Multi-Voltage Level DC Grid Based on Fault Traveling Wave Characteristic Extraction |
| title_full | Fault Detection and Zonal Protection Strategy of Multi-Voltage Level DC Grid Based on Fault Traveling Wave Characteristic Extraction |
| title_fullStr | Fault Detection and Zonal Protection Strategy of Multi-Voltage Level DC Grid Based on Fault Traveling Wave Characteristic Extraction |
| title_full_unstemmed | Fault Detection and Zonal Protection Strategy of Multi-Voltage Level DC Grid Based on Fault Traveling Wave Characteristic Extraction |
| title_short | Fault Detection and Zonal Protection Strategy of Multi-Voltage Level DC Grid Based on Fault Traveling Wave Characteristic Extraction |
| title_sort | fault detection and zonal protection strategy of multi voltage level dc grid based on fault traveling wave characteristic extraction |
| topic | DC grid DC breaker fault-blocking converter zonal protection protection coordination |
| url | https://www.mdpi.com/2079-9292/12/8/1764 |
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